Using the App:

1) Login to the App
2) Tap on "Settings"
3) Tap on "My Ovvio Account"
4) Tap on "Personal Information"
5) Edit details
6) Tap on "Save changes"

Using the Web:

1) Login to Ovvio
2) Go to "My Ovvio Account" by clicking on your display picture
3) Click on "Personal Information"
4) Edit details
5) Click on "Save"